Ninite - Ninite is the easiest way to install software.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
MacUpdater - MacUpdater - keep all your apps up-to-date effortlessly
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Sumo - Free tools to grow your email list.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.